| 摘要 |
The electronic fuse for a projectile comprises a radar emitter (2) having a resonant cavity (1) and a directional antenna (3). The presence of foreign bodies in the radar beam produces a Doppler effect which is detected by a circuit (5). This circuit (5) controls the modulation of the radar beam by means of two VHF oscillators (F1, F2) and the influence of the foreign body upon the modulated radar signal is analysed by the circuit (5) to determine if the foreign body corresponds to the target of the projectile or whether they are foreign bodies located accidentally on the trajectory of the projectile, for example, birds, droplets or micro-droplets of water. When the circuit (5) detects a signal corresponding to a motionless body of large dimensions, or a land, water or snow surface, it causes the firing of the projectile at a predetermined distance from the object.
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